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from math import log2, factorial
from matplotlib import pyplot

import numpy

def main():
    """主函数（程序入口）"""
    num = 6
    styles = ['r-.', 'g-*', 'b-o', 'y-x', 'c-^', 'm-+', 'k-d']
    legends = ['对数', '线性', '线性对数', '平方', '立方', '几何级数', '阶乘']
    x_data = [x for x in range(1, num + 1)]
    y_data1 = [log2(y) for y in range(1, num + 1)]
    y_data2 = [y for y in range(1, num + 1)]
    y_data3 = [y * log2(y) for y in range(1, num + 1)]
    y_data4 = [y ** 2 for y in range(1, num + 1)]
    y_data5 = [y ** 3 for y in range(1, num + 1)]
    y_data6 = [3 ** y for y in range(1, num + 1)]
    y_data7 = [factorial(y) for y in range(1, num + 1)]
    y_datas = [y_data1, y_data2, y_data3, y_data4, y_data5, y_data6, y_data7]
    
    ## 显示中文字体，不然会出错
    ## RuntimeWarning: Glyph missing fromcurrent font. font.set_text(s, 0, flags=flags)
    pyplot.rcParams['font.sans-serif']=['SimHei']
    pyplot.rcParams['axes.unicode_minus']=False
    
    for index, y_data in enumerate(y_datas):
        pyplot.plot(x_data, y_data, styles[index])
    pyplot.legend(legends)
    pyplot.xticks(numpy.arange(1, 7, step=1))
    pyplot.yticks(numpy.arange(0, 751, step=50))
    pyplot.show()


if __name__ == '__main__':
    main()main__':
    main()

image